Always-on, system-level blocking
Once installed, NoCall registers itself as a Call Directory extension. Your phone checks every incoming call against the synced database in milliseconds. There's nothing to open, nothing to remember.
A database that updates itself
Numbers reported by the community are reviewed and pushed to your device automatically. New scam waves are blocked across the whole network within hours of the first report.
You stay in control
Whitelisted contacts always come through. You can mark a number as safe in two taps if a label feels wrong, and the change syncs back to the community.
- Blocks ringing for known spam numbers without showing a notification
- Works fully offline — the database lives on the device
- Updates pushed silently in the background, no battery cost
- Compatible with do-not-disturb, silent mode and focus filters
- Zero impact on call quality or latency for legitimate numbers
FAQ
Does NoCall need to stay open in the background?
No. iOS and Android query the extension directly, so the app can be fully closed while protection stays on.
What happens to a blocked call?
It's silenced and routed to voicemail (or rejected, depending on your settings). The number still appears in your recent calls so nothing is hidden from you.
Can I block a private or unknown number?
Yes. NoCall offers a separate setting to silence withheld and unknown numbers, on top of the community database.